GRDB 7: Perform all writes with immediate transactions by default #1228

Job	Run time
SQLCipher3 (Xcode_16.1.app, macOS-14, Xcode 16.1)	7m 39s
SPM (Xcode_16.1.app, macOS-14, Xcode 16.1)	11m 55s
CustomSQLite (Xcode_16.1.app, macOS-14, Xcode 16.1)	6m 10s
Framework (Xcode_16.1.app, macOS-14, platform=macOS, macOS)	4m 43s
Framework (Xcode_16.1.app, macOS-14, OS=18.1,name=iPhone 15 Pro, iOS)	9m 25s
XCFramework (Xcode_16.1.app, macOS-14, Xcode 16.1)	5m 19s
Framework (Xcode_16.1.app, macOS-14, OS=18.0,name=Apple TV, tvOS)	4m 35s
SQLCipher4 (Xcode_16.1.app, macOS-14, Xcode 16.1)	12m 7s
	1h 1m 53s

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